Perhaps you should try some spelling variations:
cua triet » cua viet, su triet
va triet » va thiet, va trien, ve triet
hanh mat » hanh mot, hanh cat, hanh ma
van hanh » van thanh, ban hanh, van anh
loc van » luoc van, hoc van, lo van
vu sach » vu bach, su sach, vu khach
sach ky » sac ky, sach y, sach ty
ve cham » va cham, ve chat, vu cham
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
va cam » va cham, va cac, va cao

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: vu sach ky nang ma hoi. hieu ((ve cham) or (va cam)) loc van hanh mat ((cua triet) or (va triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang ma hoi. hieu ((ve cham) OR (va cam)) loc van hanh mat ((cua triet) OR (va triet)).
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang ma hoi. hieu ((ve cham) or (va cam)) loc van hanh mat ((cua triet) or (va triet))*.